The discipline of Operational and Architectural Management of Database Systems.

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DataBase Back Up - with a Not Null Column [closed]

Can I include a default value to be entered in the Not Null columns when I do database back ups ? If so How can I do that?
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280 views

What are the problems with sharing an Access database through online storage service, like Dropbox?

I have a desktop database I created in Access. I'd like to share the database with a single collaborator, who can have full privileges to the database (table access). However, my collaborator is much ...
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68 views

MySQL Dynamic columns duplicate value workaround

As the title suggests i have the following code which transposes certain row values into field names, however the problem im having is that the values "closed" & "reopened" may appear in several ...
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30 views

Performance/Maintenance Implications of a Write Heavy Table In An Otherwise Normal “CRUD” Database

We have a small-ish (<100,000 rows) MySQL database (on Amazon RDS). Its supporting a fairly simple read heavy CRUD web application. Currently we're building out a web analytics system. It will ...
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2answers
85 views

How should I (re) index the table while keeping the transaction log small?

I have a 170 GB table in a database. It has 70% fragmentation on its index (index has multiple columns in it). The last time I tried DBCC REINDEX the transaction log blew up in the hundreds of GBs. ...
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16 views

When importing with sqlite3, will the resulting database always be bitwise identical?

If I import a large set of data using the sqlite3 command-line utility on to different computers, will I get bitwise identical databases? For example - if I run a cryptographic hash against them, will ...
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1answer
105 views

What is the strategy of query evaluation in DBMS when Limit is used in query?

I have following tables in database post(post_id , user_id , post_text , parsed_text) ; Comment(comment_id , post_id , user_id , comment_text) ; friend(id , user_id , friend_id ) ; group (id , ...
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1answer
320 views

DB2 Commands — Different ways of stopping database

I'm hoping to get a more in-depth explanation of the following DB2 commands, which all relate to stopping the database in some way, and how they differ from each other. How do DBAs think about these ...
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1k views

MySQL - HOWTO speed up slave replication on large database / Quickly spawn slave?

We have a large mysql database (about 100GB on disk) that we would like to spawn a slave for. Our typical process for creating a slave is: Create a slave server Load in a mysql dump of the master ...
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54 views

Help with Joins - Cartesian Product

I have 5 regions that each contain 1 store and 1 warehouse. I have a table that contains the regions and corresponding stores and warehouses. I also have a table that lists the inventories of both ...
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1answer
20 views

Is this normal binary logging behaviour - maintaining one ever growing file despite expire_logs_days?

I have a Percona MySQL DB running on a dedicated server. I have in my.cnf # REPLICATION # log_bin=/var/lib/mysql/binlogs/mysql-bin expire_logs_days=7 My issue is that the log file mysql-bin.000001 ...
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2answers
386 views

Stored proc getting ANSI_NULLS and ANSI_WARNINGS error when executed by application

I have a stored procedure that is getting the following error when executed via an application : Heterogeneous queries require the ANSI_NULLS and ANSI_WARNINGS options to be set for the ...
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1answer
82 views

SQL Server 2012 Enterprise: Copy Databases to New SQL Server, Same Domain, Users, Etc

Am having trouble with what seemingly should be an easy process. I'm a SQL Server n00b, so please be gentle and very explanatory with your answers. Currently, I have a SQL Server 2012 cluster ...
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1answer
118 views

Can we restore backup for standby from external hard drive with differnet drive labels

I am using windows server 2003 and Oracle database 10g R2 and i have taken the backup using RMAN of my primary database in Drive label E. The size of backup is 1.5TB. In my standby database i don't ...
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1answer
509 views

Why not rebuild indexes with page count <1000?

I use Ola Hallengrens script for Index maintenance. Before I did that, I used the following query to see which indexes are fragmented most: SELECT dbschemas.[name] as 'Schema', dbtables.[name] as ...
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1answer
369 views

How to remove identity specification for multiple tables

I am having total 109 table in Database and now i am migrating to Amazon server with identity insert and now i want to remove auto increment column specification for all tables. How set auto increment ...
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3answers
108 views

Linux kernel parameters for oracle

I wonder what are the optimal Linux kernel parameters for oracle 11g db on 64-bit system. I didn't find any detailed, good or full recommendations or best practices for this issue. Just found one ...
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2answers
520 views

Check if database has changed to determine need to perform backup

I want to check SQL server database is modified or not. Reason to check database is modified is for backup(sql database backup) purpose. So I will be doing a full backup first and if any data ...
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2answers
4k views

Create database fails with Microsoft SQL Server Error 5133, Operating syste, error 5 (Access is denied) [closed]

I just installed SQL server 2012 on Windows 2012 today. After the install, I changed the database settings to create database files in f:\mssql instead of the default. i verified the confired and ...
3
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1answer
121 views

Trace Flag 3688 not working on SQL Server 2014

We are using some third party tools that fill up the SQL Server logs with entries like: SQL Trace ID 1 was started by login "sa". SQL Trace ID 2 was started by login "XX\xxxxx". SQL Trace stopped. ...
2
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1answer
320 views

db2 performance issue - large number of IOPS how to determine problem?

DB2 database is on storage. We are using 9.7 Storage administrators reported that today database was doing 5000 IOPS (during past days average number was 300 IOPS). Those are disk operations from ...
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2answers
77 views

Minimizing database size (Many small tables)

Our database is interesting in that we have a large amount of tables that take up a correspondingly large amount of space, but when we do a MySQL dump of said database, it is surprisingly small. ...
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20 views

Usage of temporary tables in my tempdb database on sql server 2005 [duplicate]

I am trying to resolve the disk space issue on one of my drives where tempdb residing occupies more than 100 GB: Stats shown below I read some similar post on the same and i found few queries using ...
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1answer
259 views

Can we migrate oracle database 10gR2 to cross platform

I want to know can we migrate Linux based oracle database 10gR2 (10.2.0.1.0) to windows server 2003 with oracle database 10gR2 (10.2.0.3.0). I have seen the documentation related to database migration ...
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2answers
170 views

How to identify unused databases on my sql server

I am looking for the best practices or analysis someone would have followed to identify the unused or inactive databases on my SQL Server. I went through many articles, which say possibly to go for ...
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1answer
319 views

Cannot grant execute to stored procedure [closed]

When I try to GRANT EXECUTE ON SP_NAME TO [DOMAIN\USER_NAME] on my database, I'm getting the error message below: Msg 8115, Level 16, State 1, Procedure grant_safety, Line 5 Arithmetic overflow error ...
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1answer
39 views

I cannot do anything on replSet when auth is enabled

I have a mongodb cluster with one replSet, 3 config servers, and 2 mongos instances. I logged into mongos using (admin, pwd). admin is given ["userAdminAnyDatabase", "dbAdminAnyDatabase", ...
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66 views

Exclude a User From an Audit

I need to set up a SQL Server audit to capture all database activity for all logins except one - the login our application runs under. In this case the login I want to exclude is CPSDOM\cpointedb. In ...
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0answers
21 views

Best ratio for files and file groups for a highly partitioned table

I have a number of tables with exactly 1000 partitions. Each table can be up to 200G with 100M rows and cannot be compressed. Data in partitions distributed quite equally. The SQL Server has 8 ...
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4answers
4k views

What is the purpose of having a table NOT LOGGED INITIALLY

I came across this recently. When defining a table in DB2 LUW (at least 9.5 or higher), you can define it as NOT LOGGED INITIALLY. Example from the book I read: CREATE TABLE products ( productID ...
2
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1answer
261 views

Duplicate login details per user in error log

Being able to view details of who successfully logs into a database and which user's login failed via the error logs is a good thing. However I have a scenario that I need help with: For some reason ...
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2answers
1k views

How to identify the db orphan mdf and ldf files

I want to identify the orphan mdf and ldf files on the disk and remove them. After searching on the internet, found the script below on MSDN forum. But when I run the script it returns many ...
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16 views

Regarding checkpoints

We have been stuck with some vendor companies who designed and created some of our front end applications, but are not able to help us when we have problems. The latest being, they asked us to run ...
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0answers
164 views

File group space problem

I'm having some problems with my database usage space. I have a database with autogrowth off and limited size to 150GB. When users try to import files, large databases or other massive transaction ...
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2answers
2k views

Unable to change engine to MyISAM in MySQL

I have installed MySQL 5.6.10 on Mac OS X 10.6.5. My issue is that MySQL is using InnoDB as its default engine. I have checked following engines are supported in MySQL: show engines\G ...
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1answer
2k views

How to determine if there are [idle connections with] uncommitted transactions in PostgreSQL?

According to a comment on this question I asked about idle connections in PostgreSQL 9.2, some uncommitted transactions (possibly related to some of those idle connections) might cause some ...
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45 views

On Solaris 10, does soft limit affect process memory allocated to oracle database?

System: Solaris 10 Database: Oracle 11gR2 We are encountering ORA-4030 - Out of process memory recently. I noticed that stack size was rather low in the soft limit of oracle user: ...
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0answers
24 views

CHKDB is marked RESTORING

I am seeing this in my Microsoft SQL Server 2008 R2 (SP1) database log: The database 'CHKDB_dbname' is marked RESTORING and is in a state that does not allow recovery to be run. This occurred ...
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27 views

Database Read Only after Merge Replication

Win Server 2012, SQL Server 2012 Std. I have a previously accessible database with which I'm testing merge replication and after I publish the DB, my application is saying the DB does not have write ...
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0answers
57 views

mysqldbcompare showing AUTO_INCREMENT differences but there are no missing records

I am encountering a strange issue when using mysqldbcompare to compare two MySQL DBs(one is a master, the other its slave). I noticed that the tool notes that the AUTO_INCREMENT values of this ...
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1answer
67 views

How database buffer pool work?

For example we have 2 scenarios: Scenario 1:- We have very small buffer pool size of 100MB. My query data is 500MB. Does the system keep 500MB query data in RAM such that a new ...
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32 views

Connecting remote H2 embedded database

Is there a way to connect to an H2 database, which is running in automatic mixed mode (AUTO_SERVER=TRUE) inside a web application, from another machine over SSH tunnel?
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3answers
3k views

How can I dynamically back up all SSAS databases on a given instance?

I want to dynamically back up all the databases on a given SSAS instance using a SQL Agent job (which would most likely involve executing an SSIS package). It is imperative that this is a dynamic ...
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5answers
3k views

How to delete the remote files older than N days on schedule from SQL Server 2012 (with SqlServerAgent job)?

Struggling to execute PowerShell commands in SqlServer Agent job of MS SQL Server 2012 R2 (Windows Server 2008R2, Windows 7 Prof) I need to delete (.bak files older, than, say, 7 days in remote ...
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3answers
63 views

Allowing users to compile / run PLSQL and SQL

As a DBA - assuming my users are knowledgeable with PLSQL and SQL - why would I not grant my users privileges to compile and run their own PLSQL code. We have an MI database environment where the data ...
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1answer
63 views

Notification when the status on sql server replication is “Not Running”

We have a lot of replications set up. Sometimes for some reason, the status of the replication changes to "Not Running/Expired Soon or Expired". Could you please let me know if there is a way we can ...
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91 views

How alter on infobright (BRIGHTHOUSE storage engine) actually works

I have been using infobright-3.4.1 (5.1.40) for data warehousing. I know it is outdated version but there no plan to upgrade the version currently. Even though infobright is build on mysql, the way it ...
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1answer
72 views

MySQL Performances Issues

I'm in debate with my database admin. He claims that my queries I'm sending through PHP are the problem and he is stating several things I believe are completely false. To begin I have a site ...
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2answers
2k views

sql server express admin tool portable/web

Is there a way to manage sql server express db, remotly, without installing a software. As a portable apps or a web admin (like phpmyadmin)
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3answers
98 views

Database Design for Paper Submission System

I am learner of Database design, I want to design a database for a journal paper submission system in which one paper can be submitted by one or more author. I have initially two tables Author and ...